JP2839406B2 - Direction measurement device - Google Patents
Direction measurement deviceInfo
- Publication number
- JP2839406B2 JP2839406B2 JP4623292A JP4623292A JP2839406B2 JP 2839406 B2 JP2839406 B2 JP 2839406B2 JP 4623292 A JP4623292 A JP 4623292A JP 4623292 A JP4623292 A JP 4623292A JP 2839406 B2 JP2839406 B2 JP 2839406B2
- Authority
- JP
- Japan
- Prior art keywords
- pulse
- pulse width
- time difference
- arrival
- output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Radar Systems Or Details Thereof (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、レーダ波等のパルス
変調された高周波信号の到来方位を高精度に測定する方
位測定装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an azimuth measuring apparatus for measuring the arrival azimuth of a pulse-modulated high-frequency signal such as a radar wave with high accuracy.
【０００２】[0002]
【従来の技術】図３(a) は従来の方位測定装置のブロッ
ク構成を示す図であり、図において、１ａ，１ｂはアン
テナ、２ａ，２ｂは検波器、８ａ，８ｂは立上り検出
器、９はクロック発生器、１０はカウンタである。2. Description of the Related Art FIG. 3 (a) is a diagram showing a block diagram of a conventional azimuth measuring apparatus. In the figure, 1a and 1b are antennas, 2a and 2b are detectors, 8a and 8b are rising detectors, 9a. Is a clock generator and 10 is a counter.
【０００３】次に動作について図３(b) の動作波形図を
用いて説明する。アンテナ１ａ，１ｂで受信した、パル
ス変調された高周波信号には、アンテナ間距離ｄと入射
角度θで表わされる時間差ＴNext, the operation will be described with reference to the operation waveform diagram of FIG. The pulse-modulated high-frequency signal received by the antennas 1a and 1b has a time difference T represented by the distance d between the antennas and the incident angle θ.
【０００４】Ｔ＝ (ｄ／ｃ)sinθ （ｃ＝光速）T = (d / c) sin θ (c = light speed)
【０００５】が生ずる。このアンテナ受信信号を検波器
２ａ，２ｂで検波すると、図３(b) に示す２ａ出力，２
ｂ出力が得られ、これを立上り検出器８ａ，８ｂでクロ
ック９に同期して立上り検出する。立上り検出器８ａ，
８ｂの各々の出力に生ずる時間差をカウンタ１０で計数
すると、アンテナ間の到来時間差Ｔが測定できたことに
なり、この結果を上式にあてはめることで到来方位を決
定できる。[0005] When this antenna reception signal is detected by the detectors 2a and 2b, the output 2a shown in FIG.
b output is obtained, and the rise detectors 8a and 8b detect the rise in synchronization with the clock 9. Rising detector 8a,
When the time difference occurring in each output of 8b is counted by the counter 10, the arrival time difference T between the antennas can be measured, and the arrival direction can be determined by applying the result to the above equation.
【０００６】[0006]
【発明が解決しようとする課題】従来の方位測定装置は
以上のように構成されているので、クロックの１周期が
時間差測定の最小単位となるため、測定精度を向上する
にはクロック周期を非常に短くしなければならなかっ
た。また、立上り検出器８ａ，８ｂ同士の遅延時間差が
直接誤差として影響するなどの問題点があった。Since the conventional azimuth measuring apparatus is configured as described above, one cycle of the clock is the minimum unit of the time difference measurement. cut into shall be shortened
Was . In addition, there is a problem that the delay time difference between the rising detectors 8a and 8b directly affects an error.
【０００７】この発明は、上記のような問題点を解消す
るためになされたもので、クロック周期以下の分解能で
時間差を測定できるとともに、立上り検出器を用いずに
時間差を測定して方位を測定できる方位測定装置を得る
ことを目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and can measure a time difference with a resolution equal to or less than a clock cycle, and can measure a direction by measuring a time difference without using a rising edge detector. It is an object of the present invention to obtain an azimuth measuring device that can be used.
【０００８】[0008]
【課題を解決するための手段】この発明に係る方位測定
装置は、パルス変調された高周波信号の到来方位を測定
する方位測定装置において、高周波信号を異なる位置で
受信する複数のアンテナ手段と、これらのアンテナで受
信した各信号をそれぞれ検波する複数の検波手段と、こ
れらの検波手段より得られたビデオ信号のうちの２つを
差動増幅してパルス信号を得る差動増幅手段と、この差
動増幅手段の上記パルス信号出力をＡ／Ｄ変換する手段
と、上記Ａ／Ｄ変換手段の出力のパルス幅を演算する手
段と、上記演算したパルス幅から前記各アンテナ手段間
の到来時間差を計算し、到来方位を求める方位検出手段
とを備えたものである。An azimuth measuring apparatus according to the present invention measures the azimuth of arrival of a pulse-modulated high-frequency signal.
In the azimuth measuring device for a plurality of antenna means for receiving a radio frequency signal at different positions, a plurality of detection means for detecting the signals received by these antennas respectively, of the obtained video signal from these detection means of a differential amplifier means for obtaining a pulse signal of two differentially amplifies, means for the pulse signal output of the differential amplifying means a / D converter
If, means for calculating the pulse width of the output of the A / D converting means, wherein the pulse width the calculating calculates the arrival time difference between the antenna means, direction detection means for obtaining the arrival direction
It is provided with .
【０００９】また、この発明に係る方位測定装置は、パ
ルス変調された高周波信号の到来方位を測定する方位測
定装置において、高周波信号を異なる位置で受信する複
数のアンテナ手段と、これらのアンテナで受信した各信
号をそれぞれ検波する複数の検波手段と、これらの検波
手段より得られたビデオ信号のうちの２つを差動増幅し
てパルス信号を得る差動増幅手段と、上記検波手段より
得られたビデオ信号のそれぞれのパルス幅を検出する手
段と、上記差動増幅手段の上記パルス信号出力をＡ／Ｄ
変換する手段と、上記Ａ／Ｄ変換手段の出力のパルス幅
を演算する，あるいは上記パルス幅検出手段の出力の立
ち上がりの時間差からパルス間隔を演算する手段と、上
記演算したパルス幅，あるいはパルス間隔から前記各ア
ンテナ手段間の到来時間差を計算し、到来方位を求める
方位検出手段とを備えたものである。Furthermore, the orientation measurement apparatus according to the present invention, Pas
Azimuth measurement to measure the direction of arrival of high frequency signal that has been modulated
In the constant unit, a plurality of antenna means for receiving a radio frequency signal at different positions, a plurality of detection means for detecting the respective signal <br/> No. received by these antennas, respectively, were obtained from these detection means video two of the signals to the differential amplifier
A differential amplifying means for obtaining a pulse signal Te, means for detecting the respective pulse width of the video signal obtained from said detecting means, the pulse signal output A / D of the differential amplifier means
Means for converting, pulse width of the output of the A / D conversion means, or means for calculating the pulse interval from the time difference of the rise of the output of the pulse width detection means, and the calculated pulse width or pulse interval the arrival time difference between the respective a <br/> antenna means calculated from, in which a direction detecting means for determining the arrival direction.
【００１０】[0010]
【作用】この発明に係る方位測定装置においては、パル
ス変調された高周波信号の到来方位を測定する方位測定
装置において、高周波信号を異なる位置で受信する複数
のアンテナ手段と、これらのアンテナで受信した各信号
をそれぞれ検波する複数の検波手段と、これらの検波手
段より得られたビデオ信号のうちの２つを差動増幅して
パルス信号を得る差動増幅手段と、この差動増幅手段の
上記パルス信号出力をＡ／Ｄ変換する手段と、上記Ａ／
Ｄ変換手段の出力のパルス幅を演算する手段と、上記演
算したパルス幅から前記各アンテナ手段間の到来時間差
を計算し、到来方位を求める方位検出手段とを備えたの
で、上記差動増幅手段は、アンテナで受信した信号同士
が到来時間は異なるが、振幅は同じであることを利用
し、差動増幅により時間差に対応したパルスを発生させ
るとともに、このパルス幅を測定するために一度Ａ／Ｄ
変換した上でそのパルス幅を測定することにより、時間
内挿が可能となり、高精度な時間差測定が可能となる。[Action] In the azimuth measuring device according to the present invention, Pal
Measurement to measure the direction of arrival of high-frequency signals modulated
Multiple devices that receive high frequency signals at different locations in the device
Antenna means and signals received by these antennas
Detection means for detecting the
Differentially amplify two of the video signals obtained from the stage
A differential amplifier for obtaining a pulse signal;
Means for A / D converting the pulse signal output;
Means for calculating the pulse width of the output of the D conversion means;
Arrival time difference between each antenna means from the calculated pulse width
Azimuth detection means for calculating the azimuth of arrival.
The differential amplifying means uses the fact that the signals received by the antennas have different arrival times but the same amplitude, and generates a pulse corresponding to the time difference by differential amplification, and adjusts the pulse width. A / D once to measure
By measuring the pulse width after conversion, time interpolation becomes possible, and highly accurate time difference measurement becomes possible.
【００１１】また、この発明に係る方位測定装置におい
ては、パルス変調された高周波信号の到来方位を測定す
る方位測定装置において、高周波信号を異なる位置で受
信する複数のアンテナ手段と、これらのアンテナで受信
した各信号をそれぞれ検波する複数の検波手段と、これ
らの検波手段より得られたビデオ信号のうちの２つを差
動増幅してパルス信号を得る差動増幅手段と、上記検波
手段より得られたビデオ信号のそれぞれのパルス幅を検
出する手段と、上記差動増幅手段の上記パルス信号出力
をＡ／Ｄ変換する手段と、上記Ａ／Ｄ変換手段の出力の
パルス幅を演算する，あるいは上記パルス幅検出手段の
出力の立ち上がりの時間差からパルス間隔を演算する手
段と、上記演算したパルス幅，あるいはパルス間隔から
前記各アンテナ手段間の到来時間差を計算し、到来方位
を求める方位検出手段とを備えることにより、検波手段
の出力同士を差動増幅手段で差動増幅して到来時間差に
対応したパルスを発生するとともに、このパルスをＡ／
Ｄ変換手段で振幅をサンプルするか、あるいは上記検波
手段の出力のパルス幅を検出する手段のパルスの立ち上
がりの時間差から時間差を演算するようにしたので、到
来パルスに依存することなく、より高精度な時間差測定
が可能となる。In the azimuth measuring apparatus according to the present invention , the azimuth of arrival of a pulse-modulated high-frequency signal is measured.
Direction measurement device receives high-frequency signals at different locations.
Multiple antenna means to receive and receive with these antennas
Detection means for detecting each of the signals
Two of the video signals obtained by these detection means are subtracted.
Differential amplification means for obtaining a pulse signal by dynamic amplification;
The pulse width of each of the video signals obtained by
And a pulse signal output of the differential amplifying means.
A / D conversion means, and an output of the A / D conversion means
Calculate the pulse width or use the pulse width detection means
Calculate pulse interval from output rise time difference
From the step and the pulse width or pulse interval calculated above
The arrival time difference between each antenna means is calculated, and the arrival direction is calculated.
Azimuth detection means for obtaining the output of the detection means, differentially amplifying the outputs of the detection means by the differential amplification means to generate a pulse corresponding to the arrival time difference, and
Or to sample the amplitude at D converting means, or because so as to calculates the time difference from the time difference between the pulse rise of the means for detecting the pulse width of the output of said detection means, independent of the incoming pulse, more accurate Time difference measurement becomes possible.
【００１２】[0012]
【実施例】以下、この発明の実施例を図について説明す
る。図１(a) は本発明の一実施例による方位測定装置の
ブロック構成を示す図であり、図において、１ａ，１ｂ
は受信用のアンテナ、２ａ，２ｂは検波器、３は差動増
幅器、４はＡ／Ｄ変換器、５はパルス幅演算器である。
図１(b) は上記検波器２ａ，２ｂ，差動増幅器３の出力
を示す波形図である。また図４(a),(b) は上記パルス幅
演算器５の動作を説明するための波形図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1A is a diagram showing a block configuration of an azimuth measuring device according to an embodiment of the present invention.
Is a receiving antenna, 2a and 2b are detectors, 3 is a differential amplifier, 4 is an A / D converter, and 5 is a pulse width calculator.
FIG. 1B is a waveform diagram showing the outputs of the detectors 2a and 2b and the differential amplifier 3. FIGS. 4A and 4B are waveform diagrams for explaining the operation of the pulse width calculator 5.
【００１３】次に動作を図１(b) の波形図を用いて説明
する。アンテナ１ａ，１ｂで受信した信号は、検波器２
ａ，２ｂで検波されビデオ信号となる。このビデオ信号
を差動増幅器３で差動増幅すると、差動増幅器３の出力
として到来時間差と同じ幅のパルスが出力される。な
お、この差動増幅器３は検波器２ａ，２ｂの出力信号の
立ち上り時間の差のみを検出すればよいため、図１(b)
に示すように、出力が負になる場合はこれに代えて
“０”（ロウレベル）を出力するようになっている。こ
のパルスをＡ／Ｄ変換器４でＡ／Ｄ変換し、パルス幅演
算器５で時間内挿を行いながらパルス幅を測定すること
で到来時間差を測定できる。即ち図４(a),(b)に示すよ
うに、パルス幅演算器５でＡ／Ｄ変換器４出力をもとに
パルス幅を演算するには、まず図４(a) のようにＡ／Ｄ
変換器４出力に対しＡ／Ｄサンプルポイント毎に時間内
挿し、該内挿値を用いて図４(b) に示すようにパルス幅
を演算するようにすればよい。この時間内挿をより詳し
く説明すると、図４(a) に示すように、Ａ／Ｄサンプル
ポイントが０（ロウレベル）となっている最後のポイン
トとＡ／Ｄサンプルポイントが１（ハイレベル）に立ち
上がった最初のポイントとの間を結び、かつその値が０
（ロウレベル）と１（ハイレベル）との中間の値となる
第１の時間を求め、かつＡ／Ｄサンプルポイントが１
（ハイレベル）となっている最後のポイントとＡ／Ｄサ
ンプルポイントが０（ロウレベル）に立ち下がった最初
のポイントとの間を結び、かつその値が０（ロウレベ
ル）と１（ハイレベル）との中間の値となる第２の時間
を求めるものである。そして、図４(b) に示すように、
これら第１の時間と第２の時間との時間幅を求めること
により、検波器２ａ，２ｂの出力信号の立ち上り時間の
差に応じたパルスのパルス幅を、その立ち上がりや立ち
下がりの時間をＡ／Ｄサンプルポイントの分解能以下の
精度で反映し、これを測定できるため、時間内挿を行わ
ない場合に比べ高精度な時間差測定が可能になる。 Next, the operation will be described with reference to the waveform diagram of FIG. The signals received by the antennas 1a and 1b are
The video signals are detected by a and 2b. When this video signal is differentially amplified by the differential amplifier 3, a pulse having the same width as the arrival time difference is output as the output of the differential amplifier 3. What
Note that this differential amplifier 3 is used to output signals from the detectors 2a and 2b.
Since only the difference in the rise time needs to be detected, FIG.
If the output becomes negative as shown in
"0" (low level) is output. This pulse is A / D-converted by the A / D converter 4 and the pulse width is measured while the time is interpolated by the pulse width calculator 5, whereby the arrival time difference can be measured. That is, as shown in FIGS. 4A and 4B, in order for the pulse width calculator 5 to calculate the pulse width based on the output of the A / D converter 4, first, as shown in FIG. / D
The output of the converter 4 may be time-interpolated for each A / D sample point, and the pulse width may be calculated using the interpolated value as shown in FIG. This time interpolation is explained in more detail
In more detail, as shown in FIG.
The last point whose point is 0 (low level)
And the A / D sample point is 1 (high level)
Connects to the first point that goes up and its value is 0
It is an intermediate value between (low level) and 1 (high level)
Find the first time and A / D sample point is 1
(High level) last point and A / D
The first time the sample point falls to 0 (low level)
And the value is 0 (low level)
) And 1 (high level), a second time that is an intermediate value
Is what you want. Then, as shown in FIG.
Finding the time width between the first time and the second time
As a result, the rise time of the output signals of the detectors 2a and 2b is
The pulse width of the pulse according to the difference
Set the fall time below the resolution of the A / D sample point.
Since it can be reflected and measured with accuracy, time interpolation is performed.
It is possible to measure the time difference with higher accuracy than in the case where there is no time difference.
【００１４】このように本実施例では、差動増幅手段
は、アンテナで受信した信号同士は到来時間は異なる
が、振幅は同じであることを利用し、差動増幅により時
間差に対応したパルスを発生させるとともに、このパル
ス幅を測定するために一度Ａ／Ｄ変換した上でそのパル
ス幅を測定することにより、時間内挿が可能となり、よ
り高精度な時間差測定が可能となる。As described above, in this embodiment, the differential amplifying means utilizes the fact that the signals received by the antennas have different arrival times but the same amplitude, and uses differential amplification to generate a pulse corresponding to the time difference by differential amplification. When the pulse width is generated and A / D converted once to measure the pulse width and then the pulse width is measured, time interpolation becomes possible, and more accurate time difference measurement becomes possible.
【００１５】なお、上記実施例では到来時間差が到来パ
ルス幅より短い場合（図１(b) 参照）を例にとって説明
したが、図２(a) に示す、本発明の第２の実施例のよう
に、パルス幅検出器６ａ，６ｂで到来パルス幅を測定
し、到来時間差が到来パルス幅より短い場合には上記と
同じ方法で到来時間差を測定し、到来時間差が到来パル
ス幅より長い場合にはパルス幅検出器６ａ，６ｂの出力
から立上りのトリガ（図２(b) 参照）を受け、両者の時
間差を時間差演算器７で測定することで到来パルス幅に
依存せず到来時間差を測定できる構成を得ることが可能
となる。この場合のパルス幅検出器６ａ，６ｂの動作と
しては、パルスの立ち上がり，立ち下がりを容易に検出
するために、図５(a) に示す入力波形の立ち上がり，立
ち下がりでロジックレベルのLow とHighを切り換え、図
５(b) に示す出力波形が得られる装置構成とすればよ
い。In the above embodiment, the case where the arrival time difference is shorter than the arrival pulse width (see FIG. 1 (b)) has been described as an example. However, FIG. 2 (a) shows the second embodiment of the present invention. As described above, the pulse width detectors 6a and 6b measure the arrival pulse width, and when the arrival time difference is shorter than the arrival pulse width, the arrival time difference is measured by the same method as described above, and when the arrival time difference is longer than the arrival pulse width. Receives a rising trigger (see FIG. 2B) from the outputs of the pulse width detectors 6a and 6b, and measures the time difference between the two by the time difference calculator 7, so that the arrival time difference can be measured independently of the arrival pulse width. A configuration can be obtained. In this case, the operation of the pulse width detectors 6a and 6b is such that the rising and falling edges of the pulse are easily detected, and the logic levels are set to Low and High at the rising and falling edges of the input waveform shown in FIG. May be switched so as to obtain the output waveform shown in FIG. 5 (b).
【００１６】このように第２の実施例では、検波器２
ａ，２ｂの出力同士を差動増幅器３で差動増幅して到来
時間差に対応したパルスを発生するとともに、このパル
スをＡ／Ｄ変換器４で振幅をサンプルするか、あるいは
上記両検波器２ａ，２ｂの出力のパルス幅をそれぞれ検
出するパルス幅検出器６ａ，６ｂの２つのパルスの立ち
上がりの時間差から到来時間差を演算する構成としたの
で、到来パルスに依存することなく、より高精度な時間
差測定が可能となる。As described above, in the second embodiment, the detector 2
The outputs of a and 2b are differentially amplified by the differential amplifier 3 to generate a pulse corresponding to the arrival time difference, and the amplitude of the pulse is sampled by the A / D converter 4, or the two detectors 2a are used. , 2b, the pulse width detectors 6a and 6b respectively detect the pulse widths of the outputs, so that the arrival time difference is calculated from the time difference between the rising edges of the two pulses, so that a more accurate time difference can be obtained without depending on the arrival pulse. Measurement becomes possible.
【００１７】[0017]
【発明の効果】以上のように、この発明に係る方位測定
装置によれば、パルス変調された高周波信号の到来方位
を測定する方位測定装置において、高周波信号を異なる
位置で受信する複数のアンテナ手段と、これらのアンテ
ナで受信した各信号をそれぞれ検波する複数の検波手段
と、これらの検波手段より得られたビデオ信号のうちの
２つを差動増幅して到来時間差と同じ時間幅のパルス信
号を得る差動増幅手段と、この差動増幅手段の上記パル
ス信号出力を時間内挿しながらＡ／Ｄ変換する手段と、
上記Ａ／Ｄ変換手段の出力のパルス幅を演算する手段
と、上記演算したパルス幅から前記各アンテナ手段間の
到来時間差を計算し、到来方位を求める方位検出手段と
を備え、パルス幅測定精度を向上するようにしたので、
精度の高い方位測定が行える効果がある。As described above, according to the azimuth measuring apparatus according to the present invention, the arrival azimuth of the pulse-modulated high-frequency signal is obtained.
High-frequency signal differs in the direction measurement device that measures
A plurality of antenna means for receiving at a location and their antennas
Multiple detection means for detecting each signal received by the
And of the video signals obtained by these detection means
Pulse signal having the same time width as the time difference of arrival of two differentially amplifies
Differential amplifying means for obtaining the signal
Means for performing A / D conversion while time-interpolating the source signal output ;
Means for calculating the pulse width of the output of the A / D conversion means
Between the antenna means from the pulse width calculated above
Azimuth detecting means for calculating the arrival time difference and obtaining the azimuth
The provided. Thus to improve the pulse width measurement accuracy,
There is an effect that highly accurate azimuth measurement can be performed.
【００１８】また、この発明に係る方位測定装置によれ
ば、パルス変調された高周波信号の到来方位を測定する
方位測定装置において、高周波信号を異なる位置で受信
する複数のアンテナ手段と、これらのアンテナで受信し
た各信号をそれぞれ検波する複数の検波手段と、これら
の検波手段より得られたビデオ信号のうちの２つを差動
増幅して到来時間差に対応したパルス信号を得る差動増
幅手段と、上記検波手段より得られたビデオ信号のそれ
ぞれのパルス幅を検出する手段と、上記差動増幅手段の
上記パルス信号出力をＡ／Ｄ変換する手段と、上記Ａ／
Ｄ変換手段の出力のパルス幅を演算する，あるいは上記
パルス幅検出手段の出力の立ち上がりの時間差からパル
ス間隔を演算する手段と、上記演算したパルス幅，ある
いはパルス間隔から前記各アンテナ手段間の到来時間差
を計算し、到来方位を求める方位検出手段とを備えたの
で、到来パルスに依存することなく、より高精度な時間
差測定が行える効果がある。According to the azimuth measuring device of the present invention, the azimuth of arrival of the pulse-modulated high-frequency signal is measured.
High-frequency signals are received at different positions in the direction measurement device
Multiple antenna means to receive and receive with these antennas
A plurality of detection means for detecting each signal respectively, these
Differential amplification of two of the video signals obtained from the detection means to obtain a pulse signal corresponding to the arrival time difference
Width means and that of the video signal obtained by the detection means
Means for detecting each pulse width, and
Means for A / D conversion of the pulse signal output, said A /
It calculates the pulse width of the output of the D converting means, or upper Symbol
Pal from the time difference of rise of the output of the pulse width detection hand stage
Means for calculating the pulse interval and the pulse width calculated above
Or the arrival time difference between the antenna means from the pulse interval
And an azimuth detecting means for calculating the arrival azimuth are provided , so that there is an effect that a more accurate time difference measurement can be performed without depending on the arrival pulse.
【図１】この発明の一実施例による方位測定装置のブロ
ック構成及びその動作波形図である。FIG. 1 is a block diagram of an azimuth measuring device according to an embodiment of the present invention and an operation waveform diagram thereof.
【図２】この発明の他の実施例による方位測定装置のブ
ロック構成及びその動作波形図である。FIG. 2 is a block diagram of an azimuth measuring device according to another embodiment of the present invention and an operation waveform diagram thereof.
【図３】従来の方位測定装置のブロック構成を示すブロ
ック構成図である。FIG. 3 is a block configuration diagram showing a block configuration of a conventional direction measurement device.
【図４】図１のパルス幅演算器の動作を説明する説明図
である。FIG. 4 is an explanatory diagram illustrating an operation of the pulse width calculator of FIG. 1;
【図５】図２のパルス幅検出器の動作を説明する説明図
である。FIG. 5 is an explanatory diagram illustrating an operation of the pulse width detector of FIG. 2;
１ａ，１ｂ アンテナ ２ａ，２ｂ 検波器 ３ 差動増幅器 ４ Ａ／Ｄ変換器 ５ パルス幅演算器 ６ａ，６ｂ パルス幅検出器 ７ 時間差演算器 ８ａ，８ｂ 立上り検出器 ９ クロック １０ カウンタ 1a, 1b Antenna 2a, 2b Detector 3 Differential Amplifier 4 A / D Converter 5 Pulse Width Calculator 6a, 6b Pulse Width Detector 7 Time Difference Calculator 8a, 8b Rising Detector 9 Clock 10 Counter
フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) G01S 3/00 - 3/74 G01S 3/80 - 3/86Continuation of the front page (58) Field surveyed (Int.Cl. 6 , DB name) G01S 3/00-3/74 G01S 3/80-3/86
Claims (2)
を測定する方位測定装置において、 高周波信号を異なる位置で受信する複数のアンテナ手段
と、 これらのアンテナで受信した各信号をそれぞれ検波する
複数の検波手段と、 これらの検波手段より得られたビデオ信号のうちの２つ
を差動増幅してパルス信号を得る差動増幅手段と、 この差動増幅手段の上記パルス信号出力をＡ／Ｄ変換す
る手段と、 上記Ａ／Ｄ変換手段の出力のパルス幅を演算する手段
と、 上記演算したパルス幅から前記各アンテナ手段間の到来
時間差を計算し、到来方位を求める方位検出手段とを備
えたことを特徴とする方位測定装置。1. A direction measuring apparatus for measuring the arrival direction of the pulse-modulated high-frequency signals, and a plurality of antenna means for receiving a radio frequency signal at different positions, a plurality of detecting the signals received by these antennas, respectively a detection means, a differential amplifier means for obtaining a pulse signal two <br/> the differentially amplifies of a video signal obtained from these detecting means, the pulse signal output of the differential amplifier means means for converting a / D, and means for calculating the pulse width of the output of the a / D converting means, wherein the pulse width the calculating calculates the arrival time difference between the antenna means, direction detection means for obtaining the arrival direction An orientation measuring device comprising:
を測定する方位測定装置において、 高周波信号を異なる位置で受信する複数のアンテナ手段
と、 これらのアンテナで受信した各信号をそれぞれ検波する
複数の検波手段と、 これらの検波手段より得られたビデオ信号のうちの２つ
を差動増幅してパルス信号を得る差動増幅手段と、 上記検波手段より得られたビデオ信号のそれぞれのパル
ス幅を検出する手段と、 上記差動増幅手段の上記パルス信号出力をＡ／Ｄ変換す
る手段と、 上記Ａ／Ｄ変換手段の出力のパルス幅を演算する，ある
いは上記パルス幅検出手段の出力の立ち上がりの時間差
からパルス間隔を演算する手段と、 上記演算したパルス幅，あるいはパルス間隔から前記各
アンテナ手段間の到来時間差を計算し、到来方位を求め
る方位検出手段とを備えたことを特徴とする方位測定装
置。In the azimuth measuring device for measuring the arrival direction of 2. A pulse-modulated high-frequency signals, and a plurality of antenna means for receiving a radio frequency signal at different positions, a plurality of detecting the signals received by these antennas, respectively Detecting means; differential amplifying means for differentially amplifying two of the video signals obtained by these detecting means to obtain a pulse signal; and video signals obtained by the detecting means, respectively. Means for detecting the pulse width of the differential amplifier means, A / D conversion of the pulse signal output of the differential amplifier means, and calculating the pulse width of the output of the A / D conversion means, or means for calculating the pulse interval from the time difference between the rising of the output, to calculate the arrival time difference between the computed pulse width or each <br/> antenna means from the pulse interval, the arrival direction Direction measuring device characterized by comprising an azimuth detecting means for obtaining.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4623292A JP2839406B2 (en) | 1992-01-31 | 1992-01-31 | Direction measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4623292A JP2839406B2 (en) | 1992-01-31 | 1992-01-31 | Direction measurement device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05215831A JPH05215831A (en) | 1993-08-27 |
| JP2839406B2 true JP2839406B2 (en) | 1998-12-16 |
Family
ID=12741375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4623292A Expired - Fee Related JP2839406B2 (en) | 1992-01-31 | 1992-01-31 | Direction measurement device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2839406B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19990054189A (en) * | 1997-12-26 | 1999-07-15 | 전주범 | Azimuth detector |
| JP2007127503A (en) * | 2005-11-02 | 2007-05-24 | Nippon Soken Inc | Object location detection apparatus |
-
1992
- 1992-01-31 JP JP4623292A patent/JP2839406B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05215831A (en) | 1993-08-27 |
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